Concrete mixing-and-transport truck with a rotary sealed feed-in/feed-out port of mixing drum

Abstract

A concrete mixing-and-transport truck is provided, which comprises a stirring cylinder with a rotary sealed feeding/discharging opening. A annularity sealed cavity is formed between the outer wall of a rotary inner cylinder ( 15 ), the inner wall of a fixed outer cylinder ( 6 - 2 ), the back end face of a rotary flange support base ( 6 - 1 ) and the front end face of a sealing end cover ( 7 ). At least one sealing belt ( 13 ) is set in the annularity rotary sealed cavity. The back end face of the last end sealing belt ( 13 ) is contacted tightly with the front end face of the sealing end cover ( 7 ). The stirring cylinder and the feeding/discharging opening are connected rotationally by reliable rotary sealing so as to make the stirring cylinder keep rotating when feeding, and reduce the center of gravity of the carrier vehicle. The truck improves driving safety, eliminates concrete de-mixing problem and improves the quality of concrete and architecture quality.

What is claimed is: 
     
       1. A concrete mixing-and-transport truck with a rotary sealed feed-in/feed-out port comprising:
 a sub-frame; 
 a mixing drum provided with a rotary driving mechanism on the sub-frame; 
 the rotary sealed feed-in/feed-out port is located at the back-end of the mixing drum; 
 wherein, it further comprises a rotary inner cylinder, a rotary support body and a sealing end cap; 
 said sealing end cap, including a feeding hopper and an feed-out door is connected to the rotary support body; 
 following along said rotary sealed feed-in/feed-out port of the mixing drum, the rotary inner cylinder is connected to the back end of said rotary sealed feed-in/feed-out port and the rotary support body is rotatably supported by the rotary inner cylinder; 
 at least one sealing belt is provided on the rotary inner cylinder and the back end surface of the backmost of the sealing belt is adapted to tight contact with the front end surface of the sealing end cap; and, 
 the rotary support body is installed on the sub-frame. 
 
     
     
       2. The concrete mixing-and-transport truck with a rotary sealed feed-in/feed-out port according to  claim 1 , wherein the rotary support body includes a rotary flange support seat and a fixed outer cylinder formed on the back end of said rotary flange support seat and the sealing end cap is connected to the back end of the fixed outer cylinder; then a looped seal cavity is constituted by the external wall of the rotary inner cylinder, the interior wall of the fixed outer cylinder, the back end surface of the rotary flange support seat and the front end surface of the sealing end cap and, the sealing belt is located in said looped seal cavity. 
     
     
       3. The concrete mixing-and-transport truck with a rotary sealed feed-in/feed-out port according to  claim 2 , wherein the rotary inner cylinder is connected to the rotary sealed feed-in/feed-out port of the mixing drum by a rotary flange. 
     
     
       4. The concrete mixing-and-transport truck with a rotary sealed feed-in/feed-out port according to  claim 2 , wherein a fixed flange is installed at the back end of the fixed outer cylinder and the sealing end cap is connected to the back end of fixed outer cylinder by the fixed flange. 
     
     
       5. The concrete mixing-and-transport truck with a rotary sealed feed-in/feed-out port according to  claim 2 , wherein a looped pressure belt, which is inflatable by air filling or water filling, is provided on the outside of the sealing belt; being enlarged, the looped pressure belt tightly presses the sealing belt and the sealing belt is accordingly adapted to firm contact with the external wall of the rotary inner cylinder; and the space, except the area of the sealing belt in the looped rotary seal cavity is filled up by the enlarged looped pressure belt. 
     
     
       6. The concrete mixing-and-transport truck with a rotary sealed feed-in/feed-out port according to  claim 2 , wherein the sealing belt includes air-filling or water-filling chambers, by which the sealing belt is enlarged; and the space in the looped rotary seal cavity is filled up by the enlarged sealing belt and further, a wear protection layer is further provided on the internal surface of the sealing belt. 
     
     
       7. The concrete mixing-and-transport truck with a rotary sealed feed-in/feed-out port according to  claim 2 , wherein a fixing stand, to which both ends of the sealing belt are connected or contacted, is provided on the rotary support body; and a fixing hole is provided on the fixing stand and further, a mounting rob, the front end of which is mounted on the rotary flange support seat, is provided in the fixing hole. 
     
     
       8. The concrete mixing-and-transport truck with a rotary sealed feed-in/feed-out port according to  claim 7 , wherein a lubricant container, of which a lubricant outlet is located above the rotary inner cylinder, is further provided on the fixing stand for lubricating the external wall of the rotary inner cylinder and the sealing belt. 
     
     
       9. The concrete mixing-and-transport truck with a rotary sealed feed-in/feed-out port according to  claim 3 , wherein the rotary flange support seat is contacted with the rotary flange by sliding friction or rolling friction. 
     
     
       10. The concrete mixing-and-transport truck with a rotary sealed feed-in/feed-out port according to  claim 3 , wherein a rotary sealing stand is installed on the sub-frame; a fixing support, which is connected with the rotary flange support seat by a bolt, is fixedly installed on the rotary sealing stand; and then the peripheral surface of the rotary flange keeps noncontact with the rotary flange support seat and further, a spring is installed on the bolt and the distal end of the spring is press fit above the front end of the fixing frame.